Erika Scene-Massive goof

In the scene where the Germans are first about to storm the ghetto,singing the song Erika,they clearly say "raz,dva,tri,chetiri" or "1,2,3,4" in Russian/Ukrainian.I am not aware if the Germans first sent units made up of collaborationists or forced conscripts from the east,but even if they did,i doubt they would have gone to battle singing a German song.Big mistake.-not that this film cared much about accuracy.